Brake



Feu. if, -1 @am Lesseo w LARM BRAKE #uw Aue., 2, m26

J' INVENTOR Moana uy-T0 BLLARK This invenion i'elazes to brakes, ond ie .ied es embodied in'on internal ein nding e-nooniohiie broke. in object of the invention is to improve cesain stiiioizuiei features of the ineke, to aoiii'sete menu formino sind assembly of 'ho parte.

'il 'gneei' 'to overlap iwo of the shoes of the ineke et their anchored ends. oiily to pemnit iwhe use of imei-changeable enohois for ehe two shoes, ehe tivo pairs o anchoring; ovins et the ends oi? the two shoes, one poni oiwhioh si'nddies ihn other, have 'heii ends spaced the seine disinnoe operi; (i. e. the coioesponding mons of the two shoes me the seine piene si their ends, e being' eoooinpiished hy divergence of the streddled effms et their ende. i consider it desirable to piovide ihe ends of each pair of :irnos with o, hashing for lghe pivoiz snohoi, and by he ohove-deseiihed oiionggeinent the hushinfgs oise may he inierohongeohie ii doeii-ed? sinne they one of the seine ieng'fh..

no'hei' 'feature' oi die invention ifeiofbes io oiseiing the pail' of enehoi'ing arms of oooh oi shoes. which oiins are prefeiehiy ooniiniioiions oi the side Hongos of e channei @i ned shoe body., in snoh manner Vthat peil oi' mine is anchored entirely With- Liie curve oi ehe other shoe,i., e. inside of oit-he other shoe..

'features oi 7he invention l'eieize 'Lo shoe., which rodioiing enges siidehiy siniiini end donnes oi e pivot hush- Cnfried .hv the sti'oddied shoe end; end s novei bushing :it'oinied by inserting tivo .'oifdonsidngs und 'Weiding' iheiiends togehei.

v 'The above and other objects and features of ''.he inveniiion will he apparent from the oiioiving description ofvihe iiius'tretive ein hodinient shown in the accompanying; drawinn. in which:

digfue i'. is o vertical sect-ion thiough the hrzdze inst inside ihe head of the hi'ake drum and showing" ihehi'ehe shoes in side eievaion; v v

Figure F2 is o nzniiai section through ehe nivotaiiv-eonneeed ends of two of the shoes, on the iine {2f-2 of Figure '1, hui Wiih jhe *nii/oi. omitted;

liiegore is o martini section on 'the iine 3-3 odi Figline i., showing;` the anchored end overlapping ends of two oi' the shoess ioni, with the .pivots or anchois omibed; and

Figure i is en inside pien vevv oii bhe com end oi one of the shoes, looking in ehe ii'eotion of the avrovvs 4-4 in Figure l.

ihe broke selected for iiiustietion oom-- prises a drum i0, et the einen side of which there may he arranged a support euch es e hooking pinto '12, und within which are shown eiiree brake shoes ie, 16, and i8'.l The broke may he applied Toy means such es double com 20, forcing shoes ifi.- nnd .1.8 spoii; against the resis'f-enoe oi o reinen spying 22, shoe i6 being oppiied hy shoe ie egeinet the resisonoe .of en euxiiioiy spring-934%'. i

Coni 2O may have en end flange 28 istorzdiy confining ohe :free ends of shoes 1li and 18. Shoe 18 is anchored ioyiioi'que-taking means such es e pivot 28 and shoe 16h51 ineens such :i pivo' 30, Whiie shoe 'ifi is oonneoted io shoe 'i6 h v means such es e. pivot 30. Any suite-.hie stop 3e may he provided to ydetermine Jche idle position of shoe 16.

Each of 'the shoes pi'efeiahly is generally eiionnei-shaped,` and they may he built up of en outer hand or friction port 36 Carrying the brake lining 38, together with' two speoednpert stempings. each of which io :formed to provide 'stiii'ening iionge 40 end o o viindi'ioei iiange 42 iriveted or otherwise s'eeuied to band 36. The spacing oi? enges 4.0 operi. need not he unioim throughoii: Jhe iength of the shoe, hut may very es desired. Foi exanpie, Hongos fi() of shoe i8 ere shown oiosein 'together at the com end ofc the shoe (Figure fi) than nt the anchored end (Figme I it the oem ends of shoes 14 and 15.'. iifingee e0 are burned toward oooh other, to forni oopienaz' oi'oss Honges 411'; (Figure en ranged edge to edge. A suitable oem pia-ie ei@ is spotoveided oir riveted oi' otherwise. se cured io ihesecross ianges, connecting them and biidgino across the joint between them. Ai; the adjacent ends oi shoes M and 1S, the ends of donnes 4&0 of shoe lo are somewhen closer together than, end are stradi'ed by, vthe ends of Hannes 40 of shoe ifi. To provide suitable hearings for pivot 32, novei bushings are provided.

The bushing foi.' shoe i6 is huile up of tivo hei-bushings '1i-8, eooh with e i'zldieiing end isnge 50 seated against the outer surface oi! its shoe ienge i0, the two half-bushings he ing coaxial and engaging each other edge ho ion atl

edge at their inner ends and preferably be-` ingI butt-welded into one solid unit. To accommodate any flash which may form on the inside of the bushing during welding, and obviatc the necessity for machining the inside of the welded bushing by keeping the weld away from pivot 32, the inner ends of the half-lnishings are flared slightly outward, thus defining an internal groove at the Weld. v

Each of the flanges i0 of shoeld is provided with a separate bushing 52 having a radiating end flange 52 engaging the inner surface ot' its shoe-stiliening flange 40, the 'two end flanges 5ft slidably engaging the end langes 50 of bushing 48, thus confining the end of shoel 1G laterally with respect to shoe The anchored ends of shoes 16 and 18 are also provided with bushings 48, the same as described above,` for pivots or anchors 28 and 30. ln the particular' arrangement illustrated, flanges 40 ot' shoe 18 converge somewhat at their ends, and the flanges Ll() of shoe 1G, after passing between the flanges of shoe 18 to overlap the two shoes, diverge somewhat, so that at the anchored ends of the two shoes the flanges are spaced equally apart,-i. e. the ends of. the correspondingflanges are substantially in the same plane` This permits the use of interchangeable pivots 28 and 30, since the two bushings 4S may be of the same length.

While one illustrative embodiment has been described in detail, it is not my intention to limit the scope oi the invention to that particular embodiment, or otherwise than by the terms of the appended claims.

I claim:

l. A brake comprising a pair of overlapping shoes, each having a pair of spaced arms at the end adjacent the other shoe, all oit the arms being offset from the shoes within the curvature of the shoes, the arms of one shoe beingv spaced further apart than and straddling the arms of the other shoe, in combination with torque-taking means engaged by the pair ot arms of each shoe entirely inside of the carve of the other shoe.

-2. A brake .comprising a pair of overlapped channel-shaped shoes,'each having side flanges continued at one end of the shoe as a pair ot' spaced arms, all of the arms being offsct from the shoes within the curvature of the shoes, the arms of one shoe being spaced further apart than and straddling the arms or the other shoe, in combination with torque-taking means engaged by the pair of arms of each shoe entirely inside ofA the curve of the side flanges oit the other shoe.

3. A brake shoe having spaced stilfening flanges integrally continued crosswise of the shoe toward each other at the end of shoe to form coplanar cross flanges arranged edge to edge, in combination with a wear late secured to said cross flanges and hridging the joint between them.

A brake shoe comprising spaced portions formed with openings, and n pair of half-bushings in said openings, each halfbushing having a radiating endlflange engaging the outer side of its said portlon, and the two half-bushings being coaxially arranged with their inner ends edge to edge.

5. A brake shoe comprising spaced portions formed with openings, and a pair of haltbushings in said openings, each halfbushing having a radiating end flange engaging the outer side of its said portion, and, the two half-bushings being coaxially arranged with their inner ends edge to edge and welded together.

6. A brake shoe comprising spaced portions formed 1with openings, and a pair of half-bushings" in said openings, each halfbushing having a radiating end ange engagging the outer side of its said portion, and the two half-bushings being coaxially arranged with their inner ends edge to edge, said inner 4ends flaring slightly outwardly and jointly defining an internal groove, and being butt-welded together.

7. A brake comprising two brake shoes, one shoe having spaced flanges straddlmg the end of the other shoe, said straddled' end having a pivot bushing therethrough which radiating end flanges engaging the opposite sides of the shoe` and each of the spaced flanges of the other shoe having a pivot bushing therethrough with a radiating end flange engaging the inner face of the shoe flange and slidably engaging the end flanges of the straddled shoe bushing and serving` to positioh the end of the straddled shoe ylaterally.

8. A brake comprising two brake shoes having spaced flanges at their ends, Vthe spaced flanges of one shoe straddling those of the other shoe. said straddled flanges havingr a pivot bushing therethrough connectingL and reinforcing them and formed with radiating end flanges engaging the opposite sides of the shoe. and each of the spaced flanges of the other shoe having a pivot bushingr therethrough with a radiating end flange engaging the inner face of the shoe flange and slidably engaging the end flanges ,of the straddled shoe bushing and serving to position the end of the straddled shoe laterally.

9. A brake comprising two overlapping shoes, eachhaving two anchoring arms projecting beyond the friction part of the shoe and offset within the curve of said friction part, the arms of one shoe passing between the arms of the other and then diverging so that the corresponding arms of the Vtwo-shoe! are nsubstantially the -same plane It their 1,658,760 I a i ends, in oombinatio'n with torque-taking two shoes arein substantially the sameplane means engaging the ends of each pair of at their ends, in combination with a bushing arms. for a pivot for` the shoe passing through and 10.\ A brake comprising two overlapping lcarried by the ends of each pair of arms, the

5 shoes, each having two anchoring arms pro two bushings Being of substantially the same# 15 jecting beyond. the friction part of the length. shoe andofset within the curveyof said fric- In testimony whereof, I have hereunto tion part, the arms of one shoe passing besigned my name.-

tween the arms ofthe other and then divergf 10 ing so thai', the corresponding arms, of the y A I OTTO B. CLARK. 

